Steam-air thermal power plant



ocr, 25, 1949. l J. KARRER 2,486,291

STEAK-AIR TIBRIAL POWER PLANT Filed Nw. 2o. 194s a 16 H0, *5* 0 INVENTOR.-

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4 preheat the feed Patented Oct. 25, 1949 2,486,291 STEAM-AIR THERMAL POWER. PLANT Switzerland, asslgnor to Josef Karrer, Zurich,

Ateliers de Oerlikon, Swltxerlan zei-land Application November Constru ction Oerlikon, Zurichd, a corporation of Swit- 20, 1945, Serial No. 629,879

In Switzerland-March 19, 1942 Section 1, Public Law Patent expires 4Claims.

This invention relates to steam plants, and its prime object is to provide an improved plant wherewith greater power may be derived from its consumed fuel than was heretofore attainable, and which will be furthermore more eco'- nomically installable and operable, while being more eiiicient in many other respects. Y

Other objects and advantages will hereinafter appear. v

In the accompanying drawing- Fig. 1 is a diagrammatic elevational view oi asteam power plant constituting the invention.

Fig. 2 is a similar view showing a modiiication of the invention.

In the steam plant of this invention, Fig. i, la is the boiler proper, its steam generator, 2 the supply line of the feed water, and 3 the furnace grate. i is a steam superheater which is swept by all the gases of combustion. The steam flows through pipe 5 to a steam turbine 6 and is precipitated in a condenser 'i from which it ows as feed water along a line 2, and a pump 8 insaid lineconveys the feed water to the generator i, as shown. i2 is an air heater located within the boiler l a proper and connected by a line IZa to a turbine i3. The heated compressed air works in the turbine I3, which drives the compressor is for the a1r circuit and a useful output machine l5, as a current generator.

Part of the exhaust air of the air turbine i3 flows as air of combustion through line i6 to the grate 3. The rest of the exhaust air serves to water in following manner. A line il conveys said exhaust air from line i6 to a preheater |01 for the feed `water in the line 2. In order to enhance the output of the air turbine plant more air must be delivered to and by thev compressor i6, but there is also more energy derived from the air turbine I3 and more exhaust heat available for the grate 3 and water preheater |01. The degree of eiiiciency of the entire plant becomes all the greater the less air of combustion is needed by the grate 3 to attain a specific output, as the heat of the exhaust gases is lost. In order to achieve this, the feed water is preheated partly by the exhaust air in preheater |01 and partly by the exhaust gases in preheater |02. The eiciency of the air turbine plant is thus also enhanced of the preheating of the feed water by the preheater |01.

In the modification shown in Fig. 2, the boiler ia proper is subdivided by a partitioning wall ib into two heat chambers ic, id, with two grates 31 and 32, and the steam turbine Sis ci back:

by the amount 690, August 8, 1946.

March 19, 1962.

(ci. eli-ea) pressure type,-from which the exhaust steam iows through line 1 for consumers uses. A pump 8 conveys feed water through lines 2 and preheaters |01 and |02 to the steam generator i. The compressor i4 forces the air through an air heater |21 toa high pressure turbine |31,- the exfeed water preheater |01. If after' its work in the preheater |01 any surplus heat from said exhaust air is available, such residual air may be employed for other heating purposes.

Variations may be resorted to within the scope of the invention, and portions of the im; provements may be used without others.

Having thus described my invention, I claim: having the combination of a boiler including a fire grate, a steam generator in said boiler, a steam superheater in said boiler, an engine operated by the steam from said superheater, an air heater in said boiler, an air compressor for said air heater, a turbine operated by the air from said air heater, a line conveying the exhaust from said air turbine to said nre grate, a condenser receiving the exhaust from said engine, a line conveying the water from 'said condenser to said steam generator, a pump forcing the water through said water line, said bine to said preheater.

2. A heat power plant having the combination of a boiler including a re grate, a steam generator in saidboiier, a steam superheater in said boiler, a prime mover operated by the steam from said superheater, an air heater in said boiler, an vair compressor for said air heater, a turbine operated by the air from said air heater, a line conveying the exhaust from said air turbine to said nre water to said steam generator, a pump forcing the water through said water line, said feed water line having therein a preheater, and a line conveying exhaust from said air turbine to said preheater. e

3. A heat power plant having the combination of a boiler including a re grate, a steam generator in said boiler, a steam superheater in said boiler, a prime `mover operated by the steam from said superheater, an air heater in said boiler, an air compressor for said air heater, a primary grate, a line conveying feed turbine operated by the air from said 'air heater. an additional air heater in said boiler receiving its air from the exhaust of said primary air turbine, a secondary turbine operated by the air from said additional air heater, and a line conveying the exhaust from said secondary air turbine to said ilregrate.

4. A heat power plant having the combination of a boiler including a iregrate, a steam generator in said boiler, a steam superheater in said boiler, a prime mover operated by the steam from said superheater, an air heater in said boiler, an air compressor for said air heater, a primary turbine operated by the air from said air heater, an additional air heater in said boiler receiving its air from the exhaust of said primary air turbine, a secondary turbine operated by the air from said additional air heater, a line conveying the exhaust from said secondary air turbine to said re grate, a line conveying feed water t0 said steam generator, a pump forcing the 4 water through said water line, said leed water line having therein a preheater, and a line conveying exhaust from said secondary sir turbine to said preheater.

REFERENCES CITED The following references are of record in the 10 iile of this "patent:

UNITED STATES PA 10i 

